AS 2518-1992

1 - AS 2518-1992 FUSION-BONDED LOW-DENSITY POLYETHYLENE COATING FOR PIPES AND FITTINGS
4 - PREFACE
4 - CONTENTS
5 - 1 SCOPE
5 - 2 REFERENCED DOCUMENTS
5 - 3 DEFINITIONS
5 - 3.1 Coating
5 - 3.2 Flaw
5 - 3.3 Fusion-bond
5 - 3.4 Weather exposure
5 - 3.5 Surface preparation
5 - 4 MATERIAL REQUIREMENTS
5 - 4.1 General
5 - 4.2 Polyethylene fusion-bonding compound
6 - 5 SURFACE PREPARATION AND APPLICATION OF COATING
6 - 5.1 Preparation of pipe surface
6 - 5.2 Application of polyethylene compound
6 - 5.3 Cleaning of pipe ends
6 - 5.4 End treatment of coating
6 - 6 TEST REQUIREMENTS
6 - 6.1 General
6 - 6.2 Thickness
6 - 6.3 Electric flaw detection
6 - 6.4 Bond strength
6 - 6.5 Density
6 - 6.6 Environmental stress-cracking resistance
7 - 6.7 Tensile stress at yield and percentage elongation at break
7 - 6.8 Cathodic disbonding
7 - 7 REPAIRS
7 - 7.1 General
7 - 7.2 Repair limits
7 - 7.3 Testing of repairs
7 - 8 STORAGE, HANDLING, TRANSPORT AND MARKING
7 - 8.1 Extended exposure
7 - 8.2 Handling and storage of coated pipes and fittings
7 - 8.3 Transport of coated pipes and fittings
7 - 8.4 Marking
8 - APPENDIX A - MEANS FOR DEMONSTRATING COMPLIANCE WITH THIS STANDARD
8 - A1 SCOPE
8 - A2 STATISTICAL SAMPLING
8 - A3 PRODUCT CERTIFICATION- STANDARDSMARK
8 - A4 SUPPLIER’S QUALITY SYSTEM
8 - A5 OTHER MEANS OF ASSESSMENT
8 - A5.1 General
8 - A5.2 Frequency
8 - A5.3 Retests
10 - APPENDIX B - PURCHASING GUIDELINES
10 - B1 GENERAL
10 - B2 STORAGE PERIOD
10 - B3 INFORMATION TO BE SUPPLIED BY THE PURCHASER
10 - B4 TEST CERTIFICATE
10 - B4.1 General
10 - B4.2 Certificate of compliance
10 - B4.3 Independent tests
11 - APPENDIX C - REMOVAL OF SAMPLE AND PREPARATION OF TEST SPECIMENS OF FUSION-BONDED LOW-DENSITY POLYETHYLENE COATING
11 - C1 SCOPE
11 - C2 PRINCIPLE
11 - C3 APPARATUS
11 - C4 REMOVAL OF SAMPLEFROM PIPE
11 - C5 PREPARATION OF TEST SPECIMENS
11 - C5.1 Number of test pieces
11 - C5.2 Procedure
13 - APPENDIX D - ELECTRIC FLAW DETECTION
13 - D1 SCOPE
13 - D2 APPARATUS
13 - D2.1 Electric flaw detector
13 - D2.2 Crest voltmeter
13 - D3 SETUP
13 - D4 PROCEDURE
13 - D5 REPORT
14 - APPENDIX E - BOND STRENGTH TEST
14 - E1 SCOPE
14 - E2 PRINCIPLE
14 - E3 APPARATUS
14 - E4 PREPARATION OF TEST PIECE
14 - E5 TEST CONDITIONS
14 - E6 PROCEDURE
14 - E7 REPORT
16 - APPENDIX F - METHOD FOR THE DETERMINATION OF ENVIRONMENTAL STRESS-CRACKING RESISTANCE
16 - F1 SCOPE
16 - F2 PRINCIPLE
16 - F3 APPARATUS
16 - F4 REAGENT
16 - F5 PREPARATION
16 - F6 CONDITIONING
16 - F7 PROCEDURE
16 - F8 REPORT
17 - APPENDIX G - METHOD FOR THE DETERMINATION OF TENSILE STRESS AT YIELD AND PERCENTAGE ELONGATION AT BREAK
17 - G1 SCOPE
17 - G2 PRINCIPLE
17 - G3 APPARATUS
17 - G4 PREPARATION
17 - G5 CONDITIONING
17 - G6 PROCEDURE
17 - G7 REPORT

Specifies requirements for coating for protection against corrosion, where the coating is not subject to weather exposure (a safe period of 18 months of weather exposure is allowed for to cover an extended storage period prior to installation), and the pipeline operating temperatures are not above +60 degrees Celsius nor below -40 degrees Celsius. Coating thickness for normal and heavy duty for a given range of nominal pipe sizes are tabulated.

This Standard specifies requirements for fusion-bonded low-density polyethylene coating of pipes and fittings for protection against corrosion. The coating is intended for use on pipes and fittings that are installed in locations not subject to weather exposure, although a safe period of 18 months of weather exposure is allowed for to cover the storage period prior to installation.NOTES:1 Advisory information on methods of determining compliance of a 'lot' with this Standard is given in Appendix A.2 Guidelines to purchasers on requirements that are to be specified by the purchaser and those that are to be or may be agreed upon at the time of enquiry or order are given in Appendix B.3 The attention of purchasers is drawn to the necessity to ascertain the expected weathering period of the coating before installation, and in the likelihood of 18 months being exceeded, to make provision for shielding of the coating from direct sunlight.Polyethylene materials complying with this Standard are intended for application to pipes and fittings where the pipeline operating temperatures are not normally more than +60C nor less than -40C.

First published as AS 2518-1982.
Second edition 1992.